Window latch mechanism



June 23, 1936. J. PARSONS v 2,045,198H

WINDOW LATCH MECHANISM Filed May 25, 1934 2 Sheets-Sheet 1 rsoN J Paz Nvefo June23, 1936. J. PARSONS I WINDOW LATCH MECHANISM 2 sneetssheet 2 Patented June 23, 1936 PATENT OFFIQE WINDOW LAT CH MECHANISM John Parsons, Coventry, England Application May 23,

1994, serial No. 727,195

In Great Britain May 29, 1933 5 Claims.

This invention relates to latch mechanisms for windows, doors and like closures (hereinafter, where the context admits, generically referred to as windows) and to frames therefor.

One object of the present invention is to improve the construction of windows by providing simple and effective means for closing the gaps left between relatively movable -frames in order to prevent the ingress of draughts through said gaps.

With this object in View the invention consists in a latch adapted to secure a strip to a window member comprising, a slot in the strip, a locking plate slidably mounted on the strip and formed with a slot movable into and out of register with the slot in the strip, and a hook fixed to the window member and extending through the slots to engage the looking plate.

Further features of the invention will be apparent from the description given hereafter.

In the accompanying drawings:

Figure 1 is an elevation of one form of window structure embodying a latch in accordance with the invention.

Figure 2 is a side sectional elevation showing some of the parts in a different position.

Figure 3 is a side sectional elevation on a somewhat larger scale of a part shown in Figures 1 and 2.

Figure 4 is a fragmentary view illustrating a modified detail.

In carrying my invention into effect in one convenient manner when applying the same to a window of the easement type as illustrated in the drawings, the sash frame a may be hinged in a metal or other supplementary frame b which itself is pivoted about a horizontal axis in the main frame c so that the supplementary frame may be reversed (as shown by chain dotted lines in Figure 2) in order to obtain access to both sides of the window from the inside of the structure to which the window is applied, it being convenient for this purpose to mount the supplementary frame upon trunnions d which are carried in slots e in the main frame, and such slots may be open at one end in order to permit complete removal of the frame.

If necessary or desirable the supplementary frame may carry a fanlight 1c above the casement window and a suitable stay device l may be employed for adjustment of the fanlight in any desired position.

Employment of a supplementary frame necessarily involves gaps between the main and supplementary frames andl provide improved means for rendering these gaps draught proof. Such means comprises a wooden or other suitable llet m hinged to the main window frame so that it may be thrown back (as shown in Figure 2)v for the purpose of permitting movement of the sup'u plementary frame or may be hinged inwards (as shown in Figure 1) so as to cover the gap or gaps. The fillet carries a metalor other locking plate n which preferably extends fo-r substantially the full length of the fillet and which is carried thereby by means of studs, headed screws n" or other projections upon the fillet engaging slots n2 in the locking plate, or vice versa, it being convenient in some cases that the fastening arrangements upon the fillet also comprise metal plates adapted to serve as sliding bearings for the locking plate. In order that the lo-ck may secure the fillet in place when covering the gap between the main and supplementary frames I may provide hooks o upon the sash frame adapted to pass through slots o in the fillets and corresponding slots o2 in the locking plate made to register therewith by sliding movement of the locking plate, which sliding movement is facilitated by a knob or handle p upon the locking plate.

The supplementary frame b may be held in place in the main frame by a spring pressed ball r or other suitable means, or in some cases, as shown in Figure 4, the hooks o may be provided on the supplementary frame in place, and I may provide one of the locking plates with projections s adapted to engage hooks or the like s upon the sash frame for the purpose of holding the same in its closed position.

My improved arrangement of draught-excluding iillet and locking plates may be employed with ordinary sliding sash windows or hopper windows or with any other form of Window carried upon a movable or reversible frame, and 4 the arrangement may equally well be applied to doors or other hinged or movable closures in which there is a gap or opening required to be rendered draught proof.

A similar arrangement of draught-excluding llet and locking plate may be applied to a window in which the window sash is pivoted in a supplementary frame to swing about a horizontal axis and in this case also a similar arrangement of stay may be adopted for holding the window in any desired position.

It will be understood that the draught-excluding fillets and locking plates may be employed with any desired construction of window, door or other closure. Furthermore, I am not limited to the particular means described by which the locking plate is associated with the llet and is permitted to perform its function of locking and releasing the llet as these and other details may be varied according to the type or construction of closure to which the invention is to be applied, the purpose for which the same is to be performed or any practical requirements that may have to be fulfilled.

I claim:

1. A latch for locking a strip member to a base member comprising a locking member carried by said strip member and extending over the greater part of the length thereof, said locking member being provided with two sets of slots, one set of slots co-operating with projections upon the strip member to retain the locking member for sliding movement thereon and the other set of slots co-operating With catch means upon the base member to lock the strip member thereto.

2. A latch adapted to secure a strip to a window member comprising, slots in the strip, a locking plate slidably mounted on the strip and formed with slots movable into and out of register with the slots in the strip, and hook members xed to the window member and extending outwardly through the slots in the strip and locking plate to engage the latter.

3. A latch adapted to secure a strip to a Window member comprising, a slot in the strip, a locking plate slidably mounted on the Strip and formed with a slot movable into and out of register with the slot in the strip, and a hook xed to the window member and extending through the slots to engage the locking plate.

4. A latch adapted to secure a strip over the gap between two adjacent window members comprising slots in the strip, a locking plate carried by the strip and formed with slots movable into and out of register with the slots in the strip and hooks xed to one of the window members and traversing the slots and engaging the locking plate.

5. Ai latch adapted to secure a strip to a window member comprising slots in the strip, a locking plate slidably mounted on the strip by means of headed screws traversing slots in the plate and screwed into the strip, the plate being formed with other slots movable into and out of register with the slots in the strip and locking elements xed to the window member, traversing slots in the strip and plate and engaging the plate.

JOHN PARSONS. 

